Estyrene
乙烯苯均聚物
??? 情景例句
Hey, what did you do on your trip?
嗨，旅游時玩的怎么樣？
What's the big deal?
這有什么大不了的？
There is a TV show about AIDS on right now.
電視正在播放一個關于愛滋病的節目。